Well, starting now ...1. there is a need for crystal-clear instructions how to enable 'large pages', which conditions, how to do2. some clear words on the 'Asymmetric Piece Scoring' (APS) - which parameters were sensible for which situations3. hints on 'Rook Endgame Scaling' parameter being aware of the new Rook Endgame heuristics

i am not able to understand it can u plzz elabraote a littlei just extracted and load the engine and it is not performing good i am not able to understand its parameter settings and large page function

The Windows policy Lock Pages in Memory option is disabled by default. This privilege must be enabled to configure Address Windowing Extensions (AWE). This policy determines which accounts can use a process to keep data in physical memory, preventing the system from paging the data to virtual memory on disk. On 32-bit operating systems, setting this privilege when not using AWE can significantly impair system performance. Locking pages in memory is not required on 64-bit operating systems.

The above is from the MSDN page on locking page in memory. Is there any reason that you don't accept the bolded sentence?

I've read this and don't understand. Is this bold sentence telling me that since I have Windows 7 Home Premium 64bit I don't have to lock pages to be able to use "large pages" on Rybka 4 ?

PS. I read before that you use a program that defrags memory. Can you give me a link to it? I use Game booster but apparently it's memory defrag is not good enough because I still can't get large pages working.

If you believe the MS people know what they are talking about (granted, this is a big if), then you shouldn't need to lock pages on 64-bit systems. I suspect that locking pages on 64-bit systems is simply ignored. So it doesn't hurt, but why make the process more complicated than it needs to be?

I use 7-max, which is distributed under GPL, but it hasn't been updated in almost 5 years. It's available here: http://www.7-max.com/It works fine with XP64, but I'm not confident it will work with later versions of windows.

It's an unsupported feature, but the important thing to remember is that huge pages is an Intel feature that is available for the memory manager, which is generally built into the OS. In my case, I have been using a third party memory manager which intercepts calls for dynamic memory allocation and returns pointers to huge pages. This doesn't require MS support.

What Vas has implemented in R4 uses MS's memory manager, and this seems to work in XP64 (don't know if it works in XP).

Since I never saw that post, I could not either accept or decline the bolded pages. Not everyone reads every single post on the forum. My takeway is that one doesn't have to Lock Pages in Windows 7 or Windows XP Pro 64-bit.

> 2. some clear words on the 'Asymmetric Piece Scoring' (APS) - which parameters were sensible for which situations> 3. hints on 'Rook Endgame Scaling' parameter being aware of the new Rook Endgame heuristics

Q: When do you estimate the release of Rental-Rybka?Q: What improvements have been kept for Renal-Rybka that Rybka 4 UCI does not have?

Q: you stated ages ago that Rybka 4 was much tactically stronger than Rybka 3. In my tests it misses quite a lot of stuff Rybka 3 finds and although it is generally quicker in some positions its overall score was about the same as Rybka 3. Comments?

Tactics: Yes, Rybka 4 should be clearly stronger tactically than Rybka 3. There will be some exceptions, and search has a lot of "luck" from one run to the next. If you have a specific position, I can check it out.

> Tactics: Yes, Rybka 4 should be clearly stronger tactically than Rybka 3. There will be some exceptions, and search has a lot of "luck" from one run to the next. If you have a specific position, I can check it out

Well there are quite a few positions that Rybka 4 is either slower on or cannot solve which Rybka 3 can. Here are 2 for example:

> 2. How much ELO did you deliberately hold back from Rybka 4, and these withheld improvements relate to what specific areas?> 3. What will be the initial ELO-gap between Rybka 4 and Remote Rybka?

Elo is a question for testers.

> 4. Rybka 5: will it happen and if so, approximately when?

The rough plan: fall of 2011. But please don't quote me on this, I am terrible with dates.

> 5. Is it true that you have positively, absolutely ruled out any Rybka 4 updates?

No, but with the amount of testing that we did I would be shocked if something really big slipped past us.

> 6. If a competing engine catches up to public-version Rybka 4 in strength before you release Rybka 5 how would you respond?

This probably wouldn't affect my plans or our releases.

> 7. Over the next year what are your development priorities with respect to Remote Rybka and Rybka 5?

Remote Rybka is coming, for sure. We have now a concrete, realistic plan in place. More details will be ready soon.

Rybka 5 is coming as well, a bit further down the road.

> 8. What do you consider to be Rybka 4's biggest remaining weakness, and do you plan to address this in Rybka 5?

It depends on how you define "biggest remaining weakness". Do you mean relative to top human players? This would be endgame play and strategic play. I'll address that. Or do you mean in terms of potential for further improvement? That would be normal search and normal eval. I'll address that too. Or do you mean as an analysis tool? I guess I'll address that too. :) All one small step at a time.